ISHS Acta Horticulturae 826: I International Medicinal and Aromatic Plants Conference on Culinary Herbs
VARIABILITY IN THE CHEMICAL COMPOSITION OF WILD THYMUS VULGARIS L. |
| Authors: | A. Cases, B. Pérez, P. Navarrete, E. Mora, B. Peña, A. Peluzzo, R. Calvo, D. Sánchez de Ron, F. Varela |
| Keywords: | Thymus, variability, chemical composition |
| Abstract:
Representative samples of Thymus vulgaris L. collected in Castilla-La Mancha (Spain) were analyzed to study the interspecific variability of populations. Statistical analysis of the data was performed with STATGRAPHICS and the CANDIS software from Statistical Analysis System 9 and included stepwise and multiple regression analysis (P-values < 0.05 were considered significant). The results obtained in a water distillation of volatile oils, showed a negative significant correlation between the concentration of essential oil and the latitude and altitude with a p < 0.05. The 63 samples formed by 50 plants each one, have been grouped in four classes according to the edafo-climatic characteristics of the collection sites: Z1, Mancha; Z2, Guadalajara; Z3, Mountains of Cuenca; Z4, Mountains of Albacete. The volatile oil content of each sample has been analysed by GC. The highest yield of essential oil (2.95%) occurred in group 1 samples, with high content of linalool and low content of thymol and camphor. The borneol and carvacrol concentration was highest in group 3 populations. The samples of group 2 showed the highest concentration of thymol and camphor and low essential oil content and linalool concentration. | |
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